Commander Keen in Trouble on Xion 2 is a Keen 4 mod released by DasBrot. A beta version was released in December 2004 shortly after DasBrot's First Mod. The beta retains the original Keen 4 levels, but features custom graphics (including sprites and an unfinished tileset) and a new story as well as ending sequence.

While it is presumably abandoned, Trouble on Xion 2 is notable for being the first Keen 4 mod that comes with a complete set of custom creatures as well as an original storyline.

Story

The Story starts in a deep jungle on the Xion 2 Planet which is invaded by big green hungry butterflies, the Vlorks. Commander Keen came over this planet in order to search for Gorl, whom has hidden himself in a secret cave. While in the jungle the Vlorks flutter all around Commander Keen, prepared for their lunch.